关于举行日本国立材料研究所Dr. Liyuan Han（韩礼元）学术报告的通知
2013-12-25
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关于举行日本国立材料研究所
Dr. Liyuan Han（韩礼元）学术报告的通知
报告题目：High-efficiency of Dye-sensitized Solar Cells
报告人：日本国立材料研究所Dr. Liyuan Han（韩礼元）
报告时间：2013年12月27日 上午10：00
报告地点：光电楼二楼大会议室
报告人简历：
Dr. Han is a director of photovoltaic materials unit, National Institute for Materials Science. He received a doctor’s degree from the University of Osaka Prefecture in 1988. He worked at SHARP Corporation during 1993 – 2008. He has been investigating dye-sensitized solar cells, especially, improving the conversion efficiency of cells and sub-modules, and developing new sensitized dyes, since 1996. He moved to current position from June 2008. Through his career, he has made great accomplishments in the DSCs, have been efficiency record keeper since 2006, and renewed world record efficiency of 11.4% at 2011. He is inventor in about 100 patents and author in ca 120 scientific publications in the field of dye sensitized solar cells. His current research interests involve foundational research dye-sensitized solar cells, organic solar cells and quantum dot solar cells.
摘要：
Dye-sensitized solar cells (DSCs) are promising next-generation alternatives to conventional silicon-based photovoltaic devices owing to their low cost, easy fabrication, and environmental friendliness. Although great progresses have been developed on DSCs, further improving the y is still an important task for commercialization of this kind of solar cell as power generation devices. It is well known that the conversion efficiency of a DSC usually depends on three major parameters: short circuit density (JSC), open circuit voltage (VOC) and fill factor (FF). In this presentation, our work on improvement of these important parameters for higher conversion efficiency is introduced.
We investigated the principle of dye-sensitized solar cells (DSCs) with an equivalent circuit model by electrochemical impedance spectroscopy (EIS). On the basis of the analyses of this equivalent circuit model, researches aimed at achieving high efficiency were carried out. To increase JSC, we developed new dyes with high molar extinction coefficient to improve the light harvesting efficiency, and synthesized aggregation free dyes preventing aggregation of dyes to enhance the electron collection efficiency. To increase VOC, new co-adsorbents were developed to reduce interfacial charge recombination at the TiO2 surface and improve shunt resistance.
Finally, we report our new achievement on higher JSC, VOC, and FF in the DSC with black dye and a new co-adsorbent. An overall conversion efficiency of 11.6% was achieved which is the highest certified efficiency.
